Catalytic, Enantioselective Bifunctional Inverse Electron Demand Hetero-Diels−Alder Reactions of Ketene Enolates and <i>o</i>-Benzoquinone Diimides
作者:Ciby J. Abraham、Daniel H. Paull、Michael T. Scerba、James W. Grebinski、Thomas Lectka
DOI:10.1021/ja065754d
日期:2006.10.1
which an achiral Lewis acid (activating the diene) works in concert with a chiral nucleophile (dienophile) to effect the first highly enantio- and regioselective catalyticinverseelectrondemandDiels-Alder [4 + 2] cycloaddition reaction to form biologically active quinoxalinones from ketene enolates and o-benzoquinone diimides in good to excellent yields with >99% ee.